/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c

Bug Summary

File:	src/gnu/usr.bin/binutils-2.17/gas/write.c
Warning:	line 586, column 24 Access to field 'fr_address' results in a dereference of a null pointer (loaded from variable 'last')
Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name write.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/binutils-2.17/obj/gas -resource-dir /usr/local/lib/clang/13.0.0 -D HAVE_CONFIG_H -I . -I /usr/src/gnu/usr.bin/binutils-2.17/gas -I . -D _GNU_SOURCE -I . -I /usr/src/gnu/usr.bin/binutils-2.17/gas -I ../bfd -I /usr/src/gnu/usr.bin/binutils-2.17/gas/config -I /usr/src/gnu/usr.bin/binutils-2.17/gas/../include -I /usr/src/gnu/usr.bin/binutils-2.17/gas/.. -I /usr/src/gnu/usr.bin/binutils-2.17/gas/../bfd -I /usr/src/gnu/usr.bin/binutils-2.17/gas/../intl -I ../intl -D LOCALEDIR="/usr/share/locale" -D PIE_DEFAULT=1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -Wno-null-pointer-arithmetic -fdebug-compilation-dir=/usr/src/gnu/usr.bin/binutils-2.17/obj/gas -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/gnu/usr.bin/binutils-2.17/gas/write.c
1/* write.c - emit .o file
 Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
 Free Software Foundation, Inc.

 This file is part of GAS, the GNU Assembler.

 GAS is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2, or (at your option)
 any later version.

 GAS is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with GAS; see the file COPYING.  If not, write to the Free
 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
 02110-1301, USA.  */

23/* This thing should be set up to do byteordering correctly.  But...  */

25#include "as.h"
26#include "subsegs.h"
27#include "obstack.h"
28#include "output-file.h"
29#include "dwarf2dbg.h"

31#ifndef TC_ADJUST_RELOC_COUNT
32#define TC_ADJUST_RELOC_COUNT(FIX, COUNT)
33#endif

35#ifndef TC_FORCE_RELOCATION
36#define TC_FORCE_RELOCATION(FIX)(generic_force_reloc (FIX))		\
(generic_force_reloc (FIX))
38#endif

40#ifndef TC_FORCE_RELOCATION_ABS
41#define TC_FORCE_RELOCATION_ABS(FIX)((generic_force_reloc (FIX)))		\
(TC_FORCE_RELOCATION (FIX)(generic_force_reloc (FIX)))
43#endif

45#ifndef TC_FORCE_RELOCATION_LOCAL
46#define TC_FORCE_RELOCATION_LOCAL(FIX)(!(FIX)->fx_pcrel || (FIX)->fx_plt || (FIX)->fx_r_type
 == BFD_RELOC_386_PLT32 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32
 || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC || (FIX)->fx_r_type
 == BFD_RELOC_X86_64_GOTPCREL || (generic_force_reloc (FIX)))		\
(!(FIX)->fx_pcrel				\
 || (FIX)->fx_plt				\
 || TC_FORCE_RELOCATION (FIX)(generic_force_reloc (FIX)))
50#endif

52#ifndef TC_FORCE_RELOCATION_SUB_SAME
53#define TC_FORCE_RELOCATION_SUB_SAME(FIX, SEG)(! ( (SEG) != ((asection *) &bfd_abs_section) && (
SEG) != ((asection *) &bfd_und_section) && (SEG) !=
 reg_section && (SEG) != expr_section))	\
(! SEG_NORMAL (SEG)( (SEG) != ((asection *) &bfd_abs_section) && (SEG
) != ((asection *) &bfd_und_section) && (SEG) != reg_section
 && (SEG) != expr_section))
55#endif

57#ifndef TC_FORCE_RELOCATION_SUB_ABS
58#define TC_FORCE_RELOCATION_SUB_ABS(FIX)0	0
59#endif

61#ifndef TC_FORCE_RELOCATION_SUB_LOCAL
62#ifdef DIFF_EXPR_OK
63#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX)0	0
64#else
65#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX)0	1
66#endif
67#endif

69#ifndef TC_VALIDATE_FIX_SUB
70#ifdef UNDEFINED_DIFFERENCE_OK
71/* The PA needs this for PIC code generation.  */
72#define TC_VALIDATE_FIX_SUB(FIX)((FIX)->fx_r_type == BFD_RELOC_GPREL32 || (FIX)->fx_r_type
 == BFD_RELOC_GPREL16) 1
73#else
74#define TC_VALIDATE_FIX_SUB(FIX)((FIX)->fx_r_type == BFD_RELOC_GPREL32 || (FIX)->fx_r_type
 == BFD_RELOC_GPREL16)		\
((FIX)->fx_r_type == BFD_RELOC_GPREL32	\
 || (FIX)->fx_r_type == BFD_RELOC_GPREL16)
77#endif
78#endif

80#ifndef TC_LINKRELAX_FIXUP
81#define TC_LINKRELAX_FIXUP(SEG)1 1
82#endif

84#ifndef MD_APPLY_SYM_VALUE
85#define MD_APPLY_SYM_VALUE(FIX)0 1
86#endif

88#ifndef TC_FINALIZE_SYMS_BEFORE_SIZE_SEG1
89#define TC_FINALIZE_SYMS_BEFORE_SIZE_SEG1 1
90#endif

92#ifndef	MD_PCREL_FROM_SECTION
93#define MD_PCREL_FROM_SECTION(FIX, SEC)md_pcrel_from (FIX) md_pcrel_from (FIX)
94#endif

96#ifndef TC_FAKE_LABEL
97#define TC_FAKE_LABEL(NAME)(strcmp ((NAME), "L0\001") == 0) (strcmp ((NAME), FAKE_LABEL_NAME"L0\001") == 0)
98#endif

100/* Used to control final evaluation of expressions.  */
101int finalize_syms = 0;

103int symbol_table_frozen;

105symbolS *abs_section_sym;

107/* Remember the value of dot when parsing expressions.  */
108addressT dot_value;

110void print_fixup (fixS *);

112static void renumber_sections (bfd *, asection *, PTRvoid *);

114/* We generally attach relocs to frag chains.  However, after we have
 chained these all together into a segment, any relocs we add after
 that must be attached to a segment.  This will include relocs added
 in md_estimate_size_for_relax, for example.  */
118static int frags_chained = 0;

120static int n_fixups;

122#define RELOC_ENUMenum bfd_reloc_code_real enum bfd_reloc_code_real

124static fixS *fix_new_internal (fragS *, int where, int size,
	       symbolS *add, symbolS *sub,
	       offsetT offset, int pcrel,
	       RELOC_ENUMenum bfd_reloc_code_real r_type);
128static long fixup_segment (fixS *, segT);
129static relax_addressT relax_align (relax_addressT addr, int align);
130static fragS *chain_frchains_together_1 (segT, struct frchain *);
131static void chain_frchains_together (bfd *, segT, PTRvoid *);
132static void cvt_frag_to_fill (segT, fragS *);
133static void adjust_reloc_syms (bfd *, asection *, PTRvoid *);
134static void fix_segment (bfd *, asection *, PTRvoid *);
135static void write_relocs (bfd *, asection *, PTRvoid *);
136static void write_contents (bfd *, asection *, PTRvoid *);
137static void set_symtab (void);
138static void merge_data_into_text (void);

140/* Create a fixS in obstack 'notes'.  */

142static fixS *
143fix_new_internal (fragS *frag,		/* Which frag?  */
  int where,		/* Where in that frag?  */
  int size,		/* 1, 2, or 4 usually.  */
  symbolS *add_symbol,	/* X_add_symbol.  */
  symbolS *sub_symbol,	/* X_op_symbol.  */
  offsetT offset,	/* X_add_number.  */
  int pcrel,		/* TRUE if PC-relative relocation.  */
  RELOC_ENUMenum bfd_reloc_code_real r_type ATTRIBUTE_UNUSED__attribute__ ((__unused__)) /* Relocation type.  */)
151{
fixS *fixP;

n_fixups++;

fixP = (fixS *) obstack_alloc (&notes, sizeof (fixS))__extension__ ({ struct obstack *__h = (&notes); __extension__
 ({ struct obstack *__o = (__h); int __len = ((sizeof (fixS))
); if (__o->chunk_limit - __o->next_free < __len) _obstack_newchunk
 (__o, __len); ((__o)->next_free += (__len)); (void) 0; })
; __extension__ ({ struct obstack *__o1 = (__h); void *value;
 value = (void *) __o1->object_base; if (__o1->next_free
 == value) __o1->maybe_empty_object = 1; __o1->next_free
 = (((((__o1->next_free) - (char *) 0)+__o1->alignment_mask
) & ~ (__o1->alignment_mask)) + (char *) 0); if (__o1->
next_free - (char *)__o1->chunk > __o1->chunk_limit -
 (char *)__o1->chunk) __o1->next_free = __o1->chunk_limit
; __o1->object_base = __o1->next_free; value; }); });

fixP->fx_frag = frag;
fixP->fx_where = where;
fixP->fx_size = size;
/* We've made fx_size a narrow field; check that it's wide enough.  */
if (fixP->fx_size != size)
  {
    as_bad (_("field fx_size too small to hold %d")("field fx_size too small to hold %d"), size);
    abort ()as_abort ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c", 165
, __PRETTY_FUNCTION__);
  }
fixP->fx_addsy = add_symbol;
fixP->fx_subsy = sub_symbol;
fixP->fx_offset = offset;
fixP->fx_dot_value = dot_value;
fixP->fx_pcrel = pcrel;
fixP->fx_plt = 0;
fixP->fx_r_type = r_type;
fixP->fx_im_disp = 0;
fixP->fx_pcrel_adjust = 0;
fixP->fx_bit_fixP = 0;
fixP->fx_addnumber = 0;
fixP->fx_tcbit = 0;
fixP->fx_done = 0;
fixP->fx_no_overflow = 0;
fixP->fx_signed = 0;

183#ifdef USING_CGEN
fixP->fx_cgen.insn = NULL((void*)0);
fixP->fx_cgen.opinfo = 0;
186#endif

188#ifdef TC_FIX_TYPE
TC_INIT_FIX_DATA (fixP);
190#endif

as_where (&fixP->fx_file, &fixP->fx_line);

/* Usually, we want relocs sorted numerically, but while
   comparing to older versions of gas that have relocs
   reverse sorted, it is convenient to have this compile
   time option.  xoxorich.  */
{

  fixS **seg_fix_rootP = (frags_chained
	    ? &seg_info (now_seg)->fix_root
	    : &frchain_now->fix_root);
  fixS **seg_fix_tailP = (frags_chained
	    ? &seg_info (now_seg)->fix_tail
	    : &frchain_now->fix_tail);

207#ifdef REVERSE_SORT_RELOCS

  fixP->fx_next = *seg_fix_rootP;
  *seg_fix_rootP = fixP;

212#else /* REVERSE_SORT_RELOCS  */

  fixP->fx_next = NULL((void*)0);

  if (*seg_fix_tailP)
    (*seg_fix_tailP)->fx_next = fixP;
  else
    *seg_fix_rootP = fixP;
  *seg_fix_tailP = fixP;

222#endif /* REVERSE_SORT_RELOCS  */
}

return fixP;
226}

228/* Create a fixup relative to a symbol (plus a constant).  */

230fixS *
231fix_new (fragS *frag,		/* Which frag?  */
int where,			/* Where in that frag?  */
int size,			/* 1, 2, or 4 usually.  */
symbolS *add_symbol,	/* X_add_symbol.  */
offsetT offset,		/* X_add_number.  */
int pcrel,			/* TRUE if PC-relative relocation.  */
RELOC_ENUMenum bfd_reloc_code_real r_type		/* Relocation type.  */)
238{
return fix_new_internal (frag, where, size, add_symbol,
	   (symbolS *) NULL((void*)0), offset, pcrel, r_type);
241}

243/* Create a fixup for an expression.  Currently we only support fixups
 for difference expressions.  That is itself more than most object
 file formats support anyhow.  */

247fixS *
248fix_new_exp (fragS *frag,		/* Which frag?  */
    int where,			/* Where in that frag?  */
    int size,			/* 1, 2, or 4 usually.  */
    expressionS *exp,		/* Expression.  */
    int pcrel,			/* TRUE if PC-relative relocation.  */
    RELOC_ENUMenum bfd_reloc_code_real r_type		/* Relocation type.  */)
254{
symbolS *add = NULL((void*)0);
symbolS *sub = NULL((void*)0);
offsetT off = 0;

switch (exp->X_op)
  {
  case O_absent:
    break;

  case O_register:
    as_bad (_("register value used as expression")("register value used as expression"));
    break;

  case O_add:
    /* This comes up when _GLOBAL_OFFSET_TABLE_+(.-L0) is read, if
the difference expression cannot immediately be reduced.  */
    {
symbolS *stmp = make_expr_symbol (exp);

exp->X_op = O_symbol;
exp->X_op_symbol = 0;
exp->X_add_symbol = stmp;
exp->X_add_number = 0;

return fix_new_exp (frag, where, size, exp, pcrel, r_type);
    }

  case O_symbol_rva:
    add = exp->X_add_symbol;
    off = exp->X_add_number;
    r_type = BFD_RELOC_RVA;
    break;

  case O_uminus:
    sub = exp->X_add_symbol;
    off = exp->X_add_number;
    break;

  case O_subtract:
    sub = exp->X_op_symbol;
    /* Fall through.  */
  case O_symbol:
    add = exp->X_add_symbol;
    /* Fall through.  */
  case O_constant:
    off = exp->X_add_number;
    break;

  default:
    add = make_expr_symbol (exp);
    break;
  }

return fix_new_internal (frag, where, size, add, sub, off, pcrel, r_type);
309}

311/* Generic function to determine whether a fixup requires a relocation.  */
312int
313generic_force_reloc (fixS *fix)
314{
if (fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT
    || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
  return 1;

if (fix->fx_addsy == NULL((void*)0))
  return 0;

return S_FORCE_RELOC (fix->fx_addsy, fix->fx_subsy == NULL((void*)0));
323}

325/* Append a string onto another string, bumping the pointer along.  */
326void
327append (char **charPP, char *fromP, unsigned long length)
328{
/* Don't trust memcpy() of 0 chars.  */
if (length == 0)
  return;

memcpy (*charPP, fromP, length);
*charPP += length;
335}

337/* This routine records the largest alignment seen for each segment.
 If the beginning of the segment is aligned on the worst-case
 boundary, all of the other alignments within it will work.  At
 least one object format really uses this info.  */

342void
343record_alignment (/* Segment to which alignment pertains.  */
  segT seg,
  /* Alignment, as a power of 2 (e.g., 1 => 2-byte
     boundary, 2 => 4-byte boundary, etc.)  */
  int align)
348{
if (seg == absolute_section((asection *) &bfd_abs_section))
  return;

if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg)((seg)->alignment_power + 0))
  bfd_set_section_alignment (stdoutput, seg, align)(((seg)->alignment_power = (align)),1);
354}

356int
357get_recorded_alignment (segT seg)
358{
if (seg == absolute_section((asection *) &bfd_abs_section))
  return 0;

return bfd_get_section_alignment (stdoutput, seg)((seg)->alignment_power + 0);
363}

365/* Reset the section indices after removing the gas created sections.  */

367static void
368renumber_sections (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)), asection *sec, PTRvoid * countparg)
369{
int *countp = (int *) countparg;

sec->index = *countp;
++*countp;
374}

376static fragS *
377chain_frchains_together_1 (segT section, struct frchain *frchp)
378{
fragS dummy, *prev_frag = &dummy;
fixS fix_dummy, *prev_fix = &fix_dummy;

for (; frchp && frchp->frch_seg == section; frchp = frchp->frch_next)
  {
    prev_frag->fr_next = frchp->frch_root;
    prev_frag = frchp->frch_last;
    assert (prev_frag->fr_type != 0)((void) ((prev_frag->fr_type != 0) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 386, __PRETTY_FUNCTION__), 0)));
    if (frchp->fix_root != (fixS *) NULL((void*)0))
{
 if (seg_info (section)->fix_root == (fixS *) NULL((void*)0))
   seg_info (section)->fix_root = frchp->fix_root;
 prev_fix->fx_next = frchp->fix_root;
 seg_info (section)->fix_tail = frchp->fix_tail;
 prev_fix = frchp->fix_tail;
}
  }
assert (prev_frag->fr_type != 0)((void) ((prev_frag->fr_type != 0) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 396, __PRETTY_FUNCTION__), 0)));
prev_frag->fr_next = 0;
return prev_frag;
399}

401static void
402chain_frchains_together (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)),
	 segT section,
	 PTRvoid * xxx ATTRIBUTE_UNUSED__attribute__ ((__unused__)))
405{
segment_info_type *info;

/* BFD may have introduced its own sections without using
   subseg_new, so it is possible that seg_info is NULL.  */
info = seg_info (section);
if (info != (segment_info_type *) NULL((void*)0))
  info->frchainP->frch_last
    = chain_frchains_together_1 (section, info->frchainP);

/* Now that we've chained the frags together, we must add new fixups
   to the segment, not to the frag chain.  */
frags_chained = 1;
418}

420static void
421cvt_frag_to_fill (segT sec ATTRIBUTE_UNUSED__attribute__ ((__unused__)), fragS *fragP)
422{
switch (fragP->fr_type)
  {
  case rs_align:
  case rs_align_code:
  case rs_align_test:
  case rs_org:
  case rs_space:
430#ifdef HANDLE_ALIGN
    HANDLE_ALIGN (fragP)if (fragP->fr_type == rs_align_code) i386_align_code (fragP
, (fragP->fr_next->fr_address - fragP->fr_address - fragP
->fr_fix));;
432#endif
    know (fragP->fr_next != NULL);
    fragP->fr_offset = (fragP->fr_next->fr_address
	  - fragP->fr_address
	  - fragP->fr_fix) / fragP->fr_var;
    if (fragP->fr_offset < 0)
{
 as_bad_where (fragP->fr_file, fragP->fr_line,
	_("attempt to .org/.space backwards? (%ld)")("attempt to .org/.space backwards? (%ld)"),
	(long) fragP->fr_offset);
 fragP->fr_offset = 0;
}
    fragP->fr_type = rs_fill;
    break;

  case rs_fill:
    break;

  case rs_leb128:
    {
valueT value = S_GET_VALUE (fragP->fr_symbol);
int size;

size = output_leb128 (fragP->fr_literal + fragP->fr_fix, value,
	      fragP->fr_subtype);

fragP->fr_fix += size;
fragP->fr_type = rs_fill;
fragP->fr_var = 0;
fragP->fr_offset = 0;
fragP->fr_symbol = NULL((void*)0);
    }
    break;

  case rs_cfa:
    eh_frame_convert_frag (fragP);
    break;

  case rs_dwarf2dbg:
    dwarf2dbg_convert_frag (fragP);
    break;

  case rs_machine_dependent:
    md_convert_frag (stdoutput, sec, fragP);

    assert (fragP->fr_next == NULL((void) ((fragP->fr_next == ((void*)0) || ((offsetT) (fragP
->fr_next->fr_address - fragP->fr_address) == fragP->
fr_fix)) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 479, __PRETTY_FUNCTION__), 0)))
     || ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address)((void) ((fragP->fr_next == ((void*)0) || ((offsetT) (fragP
->fr_next->fr_address - fragP->fr_address) == fragP->
fr_fix)) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 479, __PRETTY_FUNCTION__), 0)))
  == fragP->fr_fix))((void) ((fragP->fr_next == ((void*)0) || ((offsetT) (fragP
->fr_next->fr_address - fragP->fr_address) == fragP->
fr_fix)) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 479, __PRETTY_FUNCTION__), 0)));

    /* After md_convert_frag, we make the frag into a ".space 0".
md_convert_frag() should set up any fixSs and constants
required.  */
    frag_wane (fragP);
    break;

487#ifndef WORKING_DOT_WORD
  case rs_broken_word:
    {
struct broken_word *lie;

if (fragP->fr_subtype)
 {
   fragP->fr_fix += md_short_jump_size;
   for (lie = (struct broken_word *) (fragP->fr_symbol);
 lie && lie->dispfrag == fragP;
 lie = lie->next_broken_word)
     if (lie->added == 1)
fragP->fr_fix += md_long_jump_size;
 }
frag_wane (fragP);
    }
    break;
504#endif

  default:
    BAD_CASE (fragP->fr_type){ as_fatal (("Case value %ld unexpected at line %d of file \"%s\"\n"
), (long) fragP->fr_type, 507, "/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
); };
    break;
  }
510#ifdef md_frag_check
md_frag_check (fragP);
512#endif
513}

515struct relax_seg_info
516{
int pass;
int changed;
519};

521static void
522relax_seg (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)), asection *sec, void *xxx)
523{
segment_info_type *seginfo = seg_info (sec);
struct relax_seg_info *info = (struct relax_seg_info *) xxx;

if (seginfo && seginfo->frchainP
    && relax_segment (seginfo->frchainP->frch_root, sec, info->pass))
  info->changed = 1;
530}

532static void size_seg (bfd *, asection *, PTRvoid *);

534static void
535size_seg (bfd *abfd, asection *sec, PTRvoid * xxx ATTRIBUTE_UNUSED__attribute__ ((__unused__)))
536{
flagword flags;
fragS *fragp;
segment_info_type *seginfo;
int x;
valueT size, newsize;

subseg_change (sec, 0);

seginfo = seg_info (sec);
if (seginfo && seginfo->frchainP)
1
Assuming 'seginfo' is non-null→
2
←
Assuming field 'frchainP' is non-null→
3
←
Taking true branch→
  {
    for (fragp = seginfo->frchainP->frch_root; fragp; fragp = fragp->fr_next)
4
←
Loop condition is true.  Entering loop body→
5
←
Loop condition is false. Execution continues on line 550→
cvt_frag_to_fill (sec, fragp);
    for (fragp = seginfo->frchainP->frch_root;
6
←
Loop condition is false. Execution continues on line 555→
  fragp->fr_next;
  fragp = fragp->fr_next)
/* Walk to last elt.  */
;
    size = fragp->fr_address + fragp->fr_fix;
  }
else
  size = 0;

flags = bfd_get_section_flags (abfd, sec)((sec)->flags + 0);

if (size > 0 && ! seginfo->bss)
7
←
Assuming 'size' is <= 0→
  flags |= SEC_HAS_CONTENTS0x100;

/* @@ This is just an approximation.  */
if (seginfo7.1
'seginfo' is non-null
 && seginfo->fix_root)
8
←
Assuming field 'fix_root' is null→
9
←
Taking false branch→
  flags |= SEC_RELOC0x004;
else
  flags &= ~SEC_RELOC0x004;
x = bfd_set_section_flags (abfd, sec, flags);
assert (x)((void) ((x) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 571, __PRETTY_FUNCTION__), 0)));
10
←
Assuming 'x' is not equal to 0→
11
←
'?' condition is true→

newsize = md_section_align (sec, size);
x = bfd_set_section_size (abfd, sec, newsize);
assert (x)((void) ((x) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 575, __PRETTY_FUNCTION__), 0)));
12
←
Assuming 'x' is not equal to 0→
13
←
'?' condition is true→

/* If the size had to be rounded up, add some padding in the last
   non-empty frag.  */
assert (newsize >= size)((void) ((newsize >= size) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 579, __PRETTY_FUNCTION__), 0)));
14
←
'?' condition is true→
if (size != newsize)
15
←
Assuming 'size' is not equal to 'newsize'→
16
←
Taking true branch→
  {
    fragS *last = seginfo->frchainP->frch_last;
17
←
'last' initialized here→
    fragp = seginfo->frchainP->frch_root;
    while (fragp->fr_next != last)
18
←
Assuming 'last' is equal to field 'fr_next'→
19
←
Loop condition is false. Execution continues on line 586→
fragp = fragp->fr_next;
    last->fr_address = size;
20
←
Access to field 'fr_address' results in a dereference of a null pointer (loaded from variable 'last')
    if ((newsize - size) % fragp->fr_var == 0)
fragp->fr_offset += (newsize - size) / fragp->fr_var;
    else
/* If we hit this abort, it's likely due to subsegs_finish not
  providing sufficient alignment on the last frag, and the
  machine dependent code using alignment frags with fr_var
  greater than 1.  */
abort ()as_abort ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c", 594
, __PRETTY_FUNCTION__);
  }

597#ifdef tc_frob_section
tc_frob_section (sec);
599#endif
600#ifdef obj_frob_section
obj_frob_section (sec);
602#endif
603}

605#ifdef DEBUG2
606static void
607dump_section_relocs (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, FILE *stream)((void) 0)
608{
segment_info_type *seginfo = seg_info (sec);
fixS *fixp = seginfo->fix_root;

if (!fixp)
  return;

fprintf (stream, "sec %s relocs:\n", sec->name);
while (fixp)
  {
    symbolS *s = fixp->fx_addsy;

    fprintf (stream, "  %08lx: type %d ", (unsigned long) fixp,
      (int) fixp->fx_r_type);
    if (s == NULL((void*)0))
fprintf (stream, "no sym\n");
    else
{
 print_symbol_value_1 (stream, s);
 fprintf (stream, "\n");
}
    fixp = fixp->fx_next;
  }
631}
632#else
633#define dump_section_relocs(ABFD,SEC,STREAM)((void) 0)	((void) 0)
634#endif

636#ifndef EMIT_SECTION_SYMBOLS1
637#define EMIT_SECTION_SYMBOLS1 1
638#endif

640/* This pass over fixups decides whether symbols can be replaced with
 section symbols.  */

643static void
644adjust_reloc_syms (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)),
   asection *sec,
   PTRvoid * xxx ATTRIBUTE_UNUSED__attribute__ ((__unused__)))
647{
segment_info_type *seginfo = seg_info (sec);
fixS *fixp;

if (seginfo == NULL((void*)0))
  return;

dump_section_relocs (abfd, sec, stderr)((void) 0);

for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
  if (fixp->fx_done)
    /* Ignore it.  */
    ;
  else if (fixp->fx_addsy)
    {
symbolS *sym;
asection *symsec;

665#ifdef DEBUG5
fprintf (stderr(&__sF[2]), "\n\nadjusting fixup:\n");
print_fixup (fixp);
668#endif

sym = fixp->fx_addsy;

/* All symbols should have already been resolved at this
  point.  It is possible to see unresolved expression
  symbols, though, since they are not in the regular symbol
  table.  */
resolve_symbol_value (sym);

if (fixp->fx_subsy != NULL((void*)0))
 resolve_symbol_value (fixp->fx_subsy);

/* If this symbol is equated to an undefined or common symbol,
  convert the fixup to being against that symbol.  */
if (symbol_equated_reloc_p (sym)
   || S_IS_WEAKREFR (sym))
 {
   fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
   sym = symbol_get_value_expression (sym)->X_add_symbol;
   fixp->fx_addsy = sym;
 }

if (symbol_mri_common_p (sym))
 {
   /* These symbols are handled specially in fixup_segment.  */
   continue;
 }

/* If the symbol is undefined, common, weak, or global (ELF
  shared libs), we can't replace it with the section symbol.  */
if (S_FORCE_RELOC (fixp->fx_addsy, 1))
 continue;

/* Is there some other (target cpu dependent) reason we can't adjust
  this one?  (E.g. relocations involving function addresses on
  the PA.  */
705#ifdef tc_fix_adjustable
if (! tc_fix_adjustable (fixp)tc_i386_fix_adjustable(fixp))
 continue;
708#endif

/* Since we're reducing to section symbols, don't attempt to reduce
  anything that's already using one.  */
if (symbol_section_p (sym))
 continue;

symsec = S_GET_SEGMENT (sym);
if (symsec == NULL((void*)0))
 abort ()as_abort ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c", 717
, __PRETTY_FUNCTION__);

if (bfd_is_abs_section (symsec)((symsec) == ((asection *) &bfd_abs_section)))
 {
   /* The fixup_segment routine normally will not use this
             symbol in a relocation.  */
   continue;
 }

/* Don't try to reduce relocs which refer to non-local symbols
         in .linkonce sections.  It can lead to confusion when a
         debugging section refers to a .linkonce section.  I hope
         this will always be correct.  */
if (symsec != sec && ! S_IS_LOCAL (sym))
 {
   if ((symsec->flags & SEC_LINK_ONCE0x20000) != 0
|| (IS_ELF1
    /* The GNU toolchain uses an extension for ELF: a
       section beginning with the magic string
       .gnu.linkonce is a linkonce section.  */
    && strncmp (segment_name (symsec)((symsec)->name + 0), ".gnu.linkonce",
		sizeof ".gnu.linkonce" - 1) == 0))
     continue;
 }

/* Never adjust a reloc against local symbol in a merge section
  with non-zero addend.  */
if ((symsec->flags & SEC_MERGE0x1000000) != 0
   && (fixp->fx_offset != 0 || fixp->fx_subsy != NULL((void*)0)))
 continue;

/* Never adjust a reloc against TLS local symbol.  */
if ((symsec->flags & SEC_THREAD_LOCAL0x400) != 0)
 continue;

/* We refetch the segment when calling section_symbol, rather
  than using symsec, because S_GET_VALUE may wind up changing
  the section when it calls resolve_symbol_value.  */
fixp->fx_offset += S_GET_VALUE (sym);
fixp->fx_addsy = section_symbol (S_GET_SEGMENT (sym));
757#ifdef DEBUG5
fprintf (stderr(&__sF[2]), "\nadjusted fixup:\n");
print_fixup (fixp);
760#endif
    }

dump_section_relocs (abfd, sec, stderr)((void) 0);
764}

766static void
767fix_segment (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)),
    asection *sec,
    PTRvoid * xxx ATTRIBUTE_UNUSED__attribute__ ((__unused__)))
770{
segment_info_type *seginfo = seg_info (sec);

fixup_segment (seginfo->fix_root, sec);
774}

776static void
777write_relocs (bfd *abfd, asection *sec, PTRvoid * xxx ATTRIBUTE_UNUSED__attribute__ ((__unused__)))
778{
segment_info_type *seginfo = seg_info (sec);
unsigned int i;
unsigned int n;
arelent **relocs;
fixS *fixp;
char *err;

/* If seginfo is NULL, we did not create this section; don't do
   anything with it.  */
if (seginfo == NULL((void*)0))
  return;

n = 0;
for (fixp = seginfo->fix_root; fixp; fixp = fixp->fx_next)
  n++;

795#ifndef RELOC_EXPANSION_POSSIBLE
/* Set up reloc information as well.  */
relocs = (arelent **) xcalloc (n, sizeof (arelent *));

i = 0;
for (fixp = seginfo->fix_root; fixp != (fixS *) NULL((void*)0); fixp = fixp->fx_next)
  {
    arelent *reloc;
    bfd_reloc_status_type s;
    symbolS *sym;

    if (fixp->fx_done)
{
 n--;
 continue;
}

    /* If this is an undefined symbol which was equated to another
       symbol, then generate the reloc against the latter symbol
       rather than the former.  */
    sym = fixp->fx_addsy;
    while (symbol_equated_reloc_p (sym))
{
 symbolS *n;

 /* We must avoid looping, as that can occur with a badly
    written program.  */
 n = symbol_get_value_expression (sym)->X_add_symbol;
 if (n == sym)
   break;
 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
 sym = n;
}
    fixp->fx_addsy = sym;

    reloc = tc_gen_reloc (sec, fixp);
    if (!reloc)
{
 n--;
 continue;
}

    /*
This test is triggered inappropriately for the SH:
       if (fixp->fx_where + fixp->fx_size
    > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
    abort ();
    */

    s = bfd_install_relocation (stdoutput, reloc,
		  fixp->fx_frag->fr_literal,
		  fixp->fx_frag->fr_address,
		  sec, &err);
    switch (s)
{
case bfd_reloc_ok:
 break;
case bfd_reloc_overflow:
 as_bad_where (fixp->fx_file, fixp->fx_line,
	_("relocation overflow")("relocation overflow"));
 break;
case bfd_reloc_outofrange:
 as_bad_where (fixp->fx_file, fixp->fx_line,
	_("relocation out of range")("relocation out of range"));
 break;
default:
 as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x")("%s:%u: bad return from bfd_install_relocation: %x"),
    fixp->fx_file, fixp->fx_line, s);
}
    relocs[i++] = reloc;
  }
866#else
n = n * MAX_RELOC_EXPANSION;
/* Set up reloc information as well.  */
relocs = (arelent **) xcalloc (n, sizeof (arelent *));

i = 0;
for (fixp = seginfo->fix_root; fixp != (fixS *) NULL((void*)0); fixp = fixp->fx_next)
  {
    arelent **reloc;
    bfd_reloc_status_type s;
    symbolS *sym;
    int j;

    if (fixp->fx_done)
{
 n--;
 continue;
}

    /* If this is an undefined symbol which was equated to another
       symbol, then generate the reloc against the latter symbol
       rather than the former.  */
    sym = fixp->fx_addsy;
    while (symbol_equated_reloc_p (sym))
{
 symbolS *n;

 /* We must avoid looping, as that can occur with a badly
    written program.  */
 n = symbol_get_value_expression (sym)->X_add_symbol;
 if (n == sym)
   break;
 fixp->fx_offset += symbol_get_value_expression (sym)->X_add_number;
 sym = n;
}
    fixp->fx_addsy = sym;

    reloc = tc_gen_reloc (sec, fixp);

    for (j = 0; reloc[j]; j++)
{
 relocs[i++] = reloc[j];
 assert (i <= n)((void) ((i <= n) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 908, __PRETTY_FUNCTION__), 0)));
}
    if (fixp->fx_where + fixp->fx_size
 > fixp->fx_frag->fr_fix + fixp->fx_frag->fr_offset)
as_bad_where (fixp->fx_file, fixp->fx_line,
      _("internal error: fixup not contained within frag")("internal error: fixup not contained within frag"));
    for (j = 0; reloc[j]; j++)
{
 s = bfd_install_relocation (stdoutput, reloc[j],
		      fixp->fx_frag->fr_literal,
		      fixp->fx_frag->fr_address,
		      sec, &err);
 switch (s)
   {
   case bfd_reloc_ok:
     break;
   case bfd_reloc_overflow:
     as_bad_where (fixp->fx_file, fixp->fx_line,
	    _("relocation overflow")("relocation overflow"));
     break;
   case bfd_reloc_outofrange:
     as_bad_where (fixp->fx_file, fixp->fx_line,
	    _("relocation out of range")("relocation out of range"));
     break;
   default:
     as_fatal (_("%s:%u: bad return from bfd_install_relocation: %x")("%s:%u: bad return from bfd_install_relocation: %x"),
	fixp->fx_file, fixp->fx_line, s);
   }
}
  }
n = i;
939#endif

941#ifdef DEBUG4
{
  unsigned int i, j, nsyms;
  asymbol **sympp;
  sympp = bfd_get_outsymbols (stdoutput)((stdoutput)->outsymbols);
  nsyms = bfd_get_symcount (stdoutput)((stdoutput)->symcount);
  for (i = 0; i < n; i++)
    if (((*relocs[i]->sym_ptr_ptr)->flags & BSF_SECTION_SYM0x100) == 0)
{
 for (j = 0; j < nsyms; j++)
   if (sympp[j] == *relocs[i]->sym_ptr_ptr)
     break;
 if (j == nsyms)
   abort ()as_abort ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c", 954
, __PRETTY_FUNCTION__);
}
}
957#endif

if (n)
  bfd_set_reloc (stdoutput, sec, relocs, n);
else
  bfd_set_section_flags (abfd, sec,
	   (bfd_get_section_flags (abfd, sec)((sec)->flags + 0)
	    & (flagword) ~SEC_RELOC0x004));

966#ifdef SET_SECTION_RELOCS
SET_SECTION_RELOCS (sec, relocs, n);
968#endif

970#ifdef DEBUG3
{
  unsigned int i;
  arelent *r;
  asymbol *s;
  fprintf (stderr(&__sF[2]), "relocs for sec %s\n", sec->name);
  for (i = 0; i < n; i++)
    {
r = relocs[i];
s = *r->sym_ptr_ptr;
fprintf (stderr(&__sF[2]), "  reloc %2d @%p off %4lx : sym %-10s addend %lx\n",
 i, r, (unsigned long)r->address, s->name, (unsigned long)r->addend);
    }
}
984#endif
985}

987static void
988write_contents (bfd *abfd ATTRIBUTE_UNUSED__attribute__ ((__unused__)),
asection *sec,
PTRvoid * xxx ATTRIBUTE_UNUSED__attribute__ ((__unused__)))
991{
segment_info_type *seginfo = seg_info (sec);
addressT offset = 0;
fragS *f;

/* Write out the frags.  */
if (seginfo == NULL((void*)0)
    || !(bfd_get_section_flags (abfd, sec)((sec)->flags + 0) & SEC_HAS_CONTENTS0x100))
  return;

for (f = seginfo->frchainP->frch_root;
     f;
     f = f->fr_next)
  {
    int x;
    addressT fill_size;
    char *fill_literal;
    offsetT count;

    assert (f->fr_type == rs_fill)((void) ((f->fr_type == rs_fill) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 1010, __PRETTY_FUNCTION__), 0)));
    if (f->fr_fix)
{
 x = bfd_set_section_contents (stdoutput, sec,
			f->fr_literal, (file_ptr) offset,
			(bfd_size_type) f->fr_fix);
 if (!x)
   {
     bfd_perror (stdoutput->filename);
     as_perror (_("FATAL: Can't write %s")("FATAL: Can't write %s"), stdoutput->filename);
     exit (EXIT_FAILURE1);
   }
 offset += f->fr_fix;
}
    fill_literal = f->fr_literal + f->fr_fix;
    fill_size = f->fr_var;
    count = f->fr_offset;
    assert (count >= 0)((void) ((count >= 0) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 1027, __PRETTY_FUNCTION__), 0)));
    if (fill_size && count)
{
 char buf[256];
 if (fill_size > sizeof (buf))
   {
     /* Do it the old way. Can this ever happen?  */
     while (count--)
{
  x = bfd_set_section_contents (stdoutput, sec,
				fill_literal,
				(file_ptr) offset,
				(bfd_size_type) fill_size);
  if (!x)
    {
      bfd_perror (stdoutput->filename);
      as_perror (_("FATAL: Can't write %s")("FATAL: Can't write %s"),
		 stdoutput->filename);
      exit (EXIT_FAILURE1);
    }
  offset += fill_size;
}
   }
 else
   {
     /* Build a buffer full of fill objects and output it as
 often as necessary. This saves on the overhead of
 potentially lots of bfd_set_section_contents calls.  */
     int n_per_buf, i;
     if (fill_size == 1)
{
  n_per_buf = sizeof (buf);
  memset (buf, *fill_literal, n_per_buf);
}
     else
{
  char *bufp;
  n_per_buf = sizeof (buf) / fill_size;
  for (i = n_per_buf, bufp = buf; i; i--, bufp += fill_size)
    memcpy (bufp, fill_literal, fill_size);
}
     for (; count > 0; count -= n_per_buf)
{
  n_per_buf = n_per_buf > count ? count : n_per_buf;
  x = bfd_set_section_contents
    (stdoutput, sec, buf, (file_ptr) offset,
     (bfd_size_type) n_per_buf * fill_size);
  if (!x)
    as_fatal (_("cannot write to output file")("cannot write to output file"));
  offset += n_per_buf * fill_size;
}
   }
}
  }
1081}

1083static void
1084merge_data_into_text (void)
1085{
seg_info (text_section)->frchainP->frch_last->fr_next =
  seg_info (data_section)->frchainP->frch_root;
seg_info (text_section)->frchainP->frch_last =
  seg_info (data_section)->frchainP->frch_last;
seg_info (data_section)->frchainP = 0;
1091}

1093static void
1094set_symtab (void)
1095{
int nsyms;
asymbol **asympp;
symbolS *symp;
bfd_boolean result;
extern PTRvoid * bfd_alloc (bfd *, bfd_size_type);

/* Count symbols.  We can't rely on a count made by the loop in
   write_object_file, because *_frob_file may add a new symbol or
   two.  */
nsyms = 0;
for (symp = symbol_rootP; symp; symp = symbol_next (symp))
  nsyms++;

if (nsyms)
  {
    int i;
    bfd_size_type amt = (bfd_size_type) nsyms * sizeof (asymbol *);

    asympp = (asymbol **) bfd_alloc (stdoutput, amt);
    symp = symbol_rootP;
    for (i = 0; i < nsyms; i++, symp = symbol_next (symp))
{
 asympp[i] = symbol_get_bfdsym (symp);
 symbol_mark_written (symp);
}
  }
else
  asympp = 0;
result = bfd_set_symtab (stdoutput, asympp, nsyms);
assert (result)((void) ((result) ? 0 : (as_assert ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
, 1125, __PRETTY_FUNCTION__), 0)));
symbol_table_frozen = 1;
1127}

1129/* Finish the subsegments.  After every sub-segment, we fake an
 ".align ...".  This conforms to BSD4.2 brane-damage.  We then fake
 ".fill 0" because that is the kind of frag that requires least
 thought.  ".align" frags like to have a following frag since that
 makes calculating their intended length trivial.  */

1135#ifndef SUB_SEGMENT_ALIGN
1136#ifdef HANDLE_ALIGN
1137/* The last subsegment gets an alignment corresponding to the alignment
 of the section.  This allows proper nop-filling at the end of
 code-bearing sections.  */
1140#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN)0					\
(!(FRCHAIN)->frch_next || (FRCHAIN)->frch_next->frch_seg != (SEG)	\
 ? get_recorded_alignment (SEG) : 0)
1143#else
1144#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN)0 0
1145#endif
1146#endif

1148void
1149subsegs_finish (void)
1150{
struct frchain *frchainP;

for (frchainP = frchain_root; frchainP; frchainP = frchainP->frch_next)
  {
    int alignment = 0;

    subseg_set (frchainP->frch_seg, frchainP->frch_subseg);

    /* This now gets called even if we had errors.  In that case,
       any alignment is meaningless, and, moreover, will look weird
       if we are generating a listing.  */
    if (!had_errors ())
{
 alignment = SUB_SEGMENT_ALIGN (now_seg, frchainP)0;
 if ((bfd_get_section_flags (now_seg->owner, now_seg)((now_seg)->flags + 0) & SEC_MERGE0x1000000)
     && now_seg->entsize)
   {
     unsigned int entsize = now_seg->entsize;
     int entalign = 0;

     while ((entsize & 1) == 0)
{
  ++entalign;
  entsize >>= 1;
}
     if (entalign > alignment)
alignment = entalign;
   }
}

    if (subseg_text_p (now_seg))
frag_align_code (alignment, 0);
    else
frag_align (alignment, 0, 0);

    /* frag_align will have left a new frag.
Use this last frag for an empty ".fill".

For this segment ...
Create a last frag. Do not leave a "being filled in frag".  */
    frag_wane (frag_now);
    frag_now->fr_fix = 0;
    know (frag_now->fr_next == NULL);
  }
1195}

1197/* Write the object file.  */

1199void
1200write_object_file (void)
1201{
struct relax_seg_info rsi;
1203#ifndef WORKING_DOT_WORD
fragS *fragP;			/* Track along all frags.  */
1205#endif

/* Do we really want to write it?  */
{
  int n_warns, n_errs;
  n_warns = had_warnings ();
  n_errs = had_errors ();
  /* The -Z flag indicates that an object file should be generated,
     regardless of warnings and errors.  */
  if (flag_always_generate_output)
    {
if (n_warns || n_errs)
 as_warn (_("%d error%s, %d warning%s, generating bad object file")("%d error%s, %d warning%s, generating bad object file"),
   n_errs, n_errs == 1 ? "" : "s",
   n_warns, n_warns == 1 ? "" : "s");
    }
  else
    {
if (n_errs)
 as_fatal (_("%d error%s, %d warning%s, no object file generated")("%d error%s, %d warning%s, no object file generated"),
    n_errs, n_errs == 1 ? "" : "s",
    n_warns, n_warns == 1 ? "" : "s");
    }
}

1230#ifdef	OBJ_VMS
/* Under VMS we try to be compatible with VAX-11 "C".  Thus, we call
   a routine to check for the definition of the procedure "_main",
   and if so -- fix it up so that it can be program entry point.  */
vms_check_for_main ();
1235#endif /* OBJ_VMS  */

/* From now on, we don't care about sub-segments.  Build one frag chain
   for each segment. Linked thru fr_next.  */

/* Remove the sections created by gas for its own purposes.  */
{
  int i;

  bfd_section_list_remove (stdoutput, reg_section)do { asection *_s = reg_section; asection *_next = _s->next
; asection *_prev = _s->prev; if (_prev) _prev->next = _next
; else (stdoutput)->sections = _next; if (_next) _next->
prev = _prev; else (stdoutput)->section_last = _prev; } while
 (0);
  bfd_section_list_remove (stdoutput, expr_section)do { asection *_s = expr_section; asection *_next = _s->next
; asection *_prev = _s->prev; if (_prev) _prev->next = _next
; else (stdoutput)->sections = _next; if (_next) _next->
prev = _prev; else (stdoutput)->section_last = _prev; } while
 (0);
  stdoutput->section_count -= 2;
  i = 0;
  bfd_map_over_sections (stdoutput, renumber_sections, &i);
}

bfd_map_over_sections (stdoutput, chain_frchains_together, (char *) 0);

/* We have two segments. If user gave -R flag, then we must put the
   data frags into the text segment. Do this before relaxing so
   we know to take advantage of -R and make shorter addresses.  */
if (flag_readonly_data_in_text)
  {
    merge_data_into_text ();
  }

rsi.pass = 0;
while (1)
  {
1264#ifndef WORKING_DOT_WORD
    /* We need to reset the markers in the broken word list and
associated frags between calls to relax_segment (via
relax_seg).  Since the broken word list is global, we do it
once per round, rather than locally in relax_segment for each
segment.  */
    struct broken_word *brokp;

    for (brokp = broken_words;
  brokp != (struct broken_word *) NULL((void*)0);
  brokp = brokp->next_broken_word)
{
 brokp->added = 0;

 if (brokp->dispfrag != (fragS *) NULL((void*)0)
     && brokp->dispfrag->fr_type == rs_broken_word)
   brokp->dispfrag->fr_subtype = 0;
}
1282#endif

    rsi.changed = 0;
    bfd_map_over_sections (stdoutput, relax_seg, &rsi);
    rsi.pass++;
    if (!rsi.changed)
break;
  }

/* Note - Most ports will use the default value of
   TC_FINALIZE_SYMS_BEFORE_SIZE_SEG, which 1.  This will force
   local symbols to be resolved, removing their frag information.
   Some ports however, will not have finished relaxing all of
   their frags and will still need the local symbol frag
   information.  These ports can set
   TC_FINALIZE_SYMS_BEFORE_SIZE_SEG to 0.  */
finalize_syms = TC_FINALIZE_SYMS_BEFORE_SIZE_SEG1;

bfd_map_over_sections (stdoutput, size_seg, (char *) 0);

/* Relaxation has completed.  Freeze all syms.  */
finalize_syms = 1;

1305#ifdef md_post_relax_hook
md_post_relax_hook;
1307#endif

1309#ifndef WORKING_DOT_WORD
{
  struct broken_word *lie;
  struct broken_word **prevP;

  prevP = &broken_words;
  for (lie = broken_words; lie; lie = lie->next_broken_word)
    if (!lie->added)
{
 expressionS exp;

 subseg_change (lie->seg, lie->subseg);
 exp.X_op = O_subtract;
 exp.X_add_symbol = lie->add;
 exp.X_op_symbol = lie->sub;
 exp.X_add_number = lie->addnum;
1325#ifdef TC_CONS_FIX_NEW
 TC_CONS_FIX_NEW (lie->frag,x86_cons_fix_new(lie->frag, lie->word_goes_here - lie->
frag->fr_literal, 2, &exp)
	   lie->word_goes_here - lie->frag->fr_literal,x86_cons_fix_new(lie->frag, lie->word_goes_here - lie->
frag->fr_literal, 2, &exp)
	   2, &exp)x86_cons_fix_new(lie->frag, lie->word_goes_here - lie->
frag->fr_literal, 2, &exp);
1329#else
 fix_new_exp (lie->frag,
       lie->word_goes_here - lie->frag->fr_literal,
       2, &exp, 0, BFD_RELOC_16);
1333#endif
 *prevP = lie->next_broken_word;
}
    else
prevP = &(lie->next_broken_word);

  for (lie = broken_words; lie;)
    {
struct broken_word *untruth;
char *table_ptr;
addressT table_addr;
addressT from_addr, to_addr;
int n, m;

subseg_change (lie->seg, lie->subseg);
fragP = lie->dispfrag;

/* Find out how many broken_words go here.  */
n = 0;
for (untruth = lie;
    untruth && untruth->dispfrag == fragP;
    untruth = untruth->next_broken_word)
 if (untruth->added == 1)
   n++;

table_ptr = lie->dispfrag->fr_opcode;
table_addr = (lie->dispfrag->fr_address
      + (table_ptr - lie->dispfrag->fr_literal));
/* Create the jump around the long jumps.  This is a short
  jump from table_ptr+0 to table_ptr+n*long_jump_size.  */
from_addr = table_addr;
to_addr = table_addr + md_short_jump_size + n * md_long_jump_size;
md_create_short_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
	      lie->add);
table_ptr += md_short_jump_size;
table_addr += md_short_jump_size;

for (m = 0;
    lie && lie->dispfrag == fragP;
    m++, lie = lie->next_broken_word)
 {
   if (lie->added == 2)
     continue;
   /* Patch the jump table.  */
   /* This is the offset from ??? to table_ptr+0.  */
   to_addr = table_addr - S_GET_VALUE (lie->sub);
1379#ifdef TC_CHECK_ADJUSTED_BROKEN_DOT_WORD
   TC_CHECK_ADJUSTED_BROKEN_DOT_WORD (to_addr, lie);
1381#endif
   md_number_to_charsnumber_to_chars_littleendian (lie->word_goes_here, to_addr, 2);
   for (untruth = lie->next_broken_word;
 untruth && untruth->dispfrag == fragP;
 untruth = untruth->next_broken_word)
     {
if (untruth->use_jump == lie)
  md_number_to_charsnumber_to_chars_littleendian (untruth->word_goes_here, to_addr, 2);
     }

   /* Install the long jump.  */
   /* This is a long jump from table_ptr+0 to the final target.  */
   from_addr = table_addr;
   to_addr = S_GET_VALUE (lie->add) + lie->addnum;
   md_create_long_jump (table_ptr, from_addr, to_addr, lie->dispfrag,
		 lie->add);
   table_ptr += md_long_jump_size;
   table_addr += md_long_jump_size;
 }
    }
}
1402#endif /* not WORKING_DOT_WORD  */

/* Resolve symbol values.  This needs to be done before processing
   the relocations.  */
if (symbol_rootP)
  {
    symbolS *symp;

    for (symp = symbol_rootP; symp; symp = symbol_next (symp))
resolve_symbol_value (symp);
  }
resolve_local_symbol_values ();

PROGRESS (1);

1417#ifdef tc_frob_file_before_adjust
tc_frob_file_before_adjust ();
1419#endif
1420#ifdef obj_frob_file_before_adjustelf_frob_file_before_adjust
obj_frob_file_before_adjustelf_frob_file_before_adjust ();
1422#endif

bfd_map_over_sections (stdoutput, adjust_reloc_syms, (char *) 0);

1426#ifdef tc_frob_file_before_fix
tc_frob_file_before_fix ();
1428#endif
1429#ifdef obj_frob_file_before_fix
obj_frob_file_before_fix ();
1431#endif

bfd_map_over_sections (stdoutput, fix_segment, (char *) 0);

/* Set up symbol table, and write it out.  */
if (symbol_rootP)
  {
    symbolS *symp;
    bfd_boolean skip_next_symbol = FALSE0;

    for (symp = symbol_rootP; symp; symp = symbol_next (symp))
{
 int punt = 0;
 const char *name;

 if (skip_next_symbol)
   {
     /* Don't do anything besides moving the value of the
 symbol from the GAS value-field to the BFD value-field.  */
     symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);
     skip_next_symbol = FALSE0;
     continue;
   }

 if (symbol_mri_common_p (symp))
   {
     if (S_IS_EXTERNAL (symp))
as_bad (_("%s: global symbols not supported in common sections")("%s: global symbols not supported in common sections"),
	S_GET_NAME (symp));
     symbol_remove (symp, &symbol_rootP, &symbol_lastP);
     continue;
   }

 name = S_GET_NAME (symp);
 if (name)
   {
     const char *name2 =
decode_local_label_name ((char *) S_GET_NAME (symp));
     /* They only differ if `name' is a fb or dollar local
 label name.  */
     if (name2 != name && ! S_IS_DEFINED (symp))
as_bad (_("local label `%s' is not defined")("local label `%s' is not defined"), name2);
   }

 /* Do it again, because adjust_reloc_syms might introduce
    more symbols.  They'll probably only be section symbols,
    but they'll still need to have the values computed.  */
 resolve_symbol_value (symp);

 /* Skip symbols which were equated to undefined or common
           symbols.  */
 if (symbol_equated_reloc_p (symp)
     || S_IS_WEAKREFR (symp))
   {
     const char *name = S_GET_NAME (symp);
     if (S_IS_COMMON (symp)
  && !TC_FAKE_LABEL (name)(strcmp ((name), "L0\001") == 0)
  && !S_IS_WEAKREFR (symp)
  && (!S_IS_EXTERNAL (symp) || S_IS_LOCAL (symp)))
{
  expressionS *e = symbol_get_value_expression (symp);
  as_bad (_("Local symbol `%s' can't be equated to common symbol `%s'")("Local symbol `%s' can't be equated to common symbol `%s'"),
	  name, S_GET_NAME (e->X_add_symbol));
}
     symbol_remove (symp, &symbol_rootP, &symbol_lastP);
     continue;
   }

1499#ifdef obj_frob_symbol
 obj_frob_symbol (symp, punt)elf_frob_symbol (symp, &punt);
1501#endif
1502#ifdef tc_frob_symbol
 if (! punt || symbol_used_in_reloc_p (symp))
   tc_frob_symbol (symp, punt);
1505#endif

 /* If we don't want to keep this symbol, splice it out of
    the chain now.  If EMIT_SECTION_SYMBOLS is 0, we never
    want section symbols.  Otherwise, we skip local symbols
    and symbols that the frob_symbol macros told us to punt,
    but we keep such symbols if they are used in relocs.  */
 if (symp == abs_section_sym
     || (! EMIT_SECTION_SYMBOLS1
  && symbol_section_p (symp))
     /* Note that S_IS_EXTERNAL and S_IS_LOCAL are not always
 opposites.  Sometimes the former checks flags and the
 latter examines the name...  */
     || (!S_IS_EXTERNAL (symp)
  && (punt || S_IS_LOCAL (symp) ||
      (S_IS_WEAKREFD (symp) && ! symbol_used_p (symp)))
  && ! symbol_used_in_reloc_p (symp)))
   {
     symbol_remove (symp, &symbol_rootP, &symbol_lastP);

     /* After symbol_remove, symbol_next(symp) still returns
 the one that came after it in the chain.  So we don't
 need to do any extra cleanup work here.  */
     continue;
   }

 /* Make sure we really got a value for the symbol.  */
 if (! symbol_resolved_p (symp))
   {
     as_bad (_("can't resolve value for symbol `%s'")("can't resolve value for symbol `%s'"),
      S_GET_NAME (symp));
     symbol_mark_resolved (symp);
   }

 /* Set the value into the BFD symbol.  Up til now the value
    has only been kept in the gas symbolS struct.  */
 symbol_get_bfdsym (symp)->value = S_GET_VALUE (symp);

 /* A warning construct is a warning symbol followed by the
    symbol warned about.  Don't let anything object-format or
    target-specific muck with it; it's ready for output.  */
 if (symbol_get_bfdsym (symp)->flags & BSF_WARNING0x1000)
   skip_next_symbol = TRUE1;
}
  }

PROGRESS (1);

/* Now do any format-specific adjustments to the symbol table, such
   as adding file symbols.  */
1555#ifdef tc_adjust_symtab
tc_adjust_symtab ();
1557#endif
1558#ifdef obj_adjust_symtab
obj_adjust_symtab ();
1560#endif

/* Now that all the sizes are known, and contents correct, we can
   start writing to the file.  */
set_symtab ();

/* If *_frob_file changes the symbol value at this point, it is
   responsible for moving the changed value into symp->bsym->value
   as well.  Hopefully all symbol value changing can be done in
   *_frob_symbol.  */
1570#ifdef tc_frob_file
tc_frob_file ();
1572#endif
1573#ifdef obj_frob_fileelf_frob_file
obj_frob_fileelf_frob_file ();
1575#endif

bfd_map_over_sections (stdoutput, write_relocs, (char *) 0);

1579#ifdef tc_frob_file_after_relocs
tc_frob_file_after_relocs ();
1581#endif
1582#ifdef obj_frob_file_after_relocself_frob_file_after_relocs
obj_frob_file_after_relocself_frob_file_after_relocs ();
1584#endif

bfd_map_over_sections (stdoutput, write_contents, (char *) 0);
1587}

1589#ifdef TC_GENERIC_RELAX_TABLEmd_relax_table
1590/* Relax a fragment by scanning TC_GENERIC_RELAX_TABLE.  */

1592long
1593relax_frag (segT segment, fragS *fragP, long stretch)
1594{
const relax_typeS *this_type;
const relax_typeS *start_type;
relax_substateT next_state;
relax_substateT this_state;
offsetT growth;
offsetT aim;
addressT target;
addressT address;
symbolS *symbolP;
const relax_typeS *table;

target = fragP->fr_offset;
address = fragP->fr_address;
table = TC_GENERIC_RELAX_TABLEmd_relax_table;
this_state = fragP->fr_subtype;
start_type = this_type = table + this_state;
symbolP = fragP->fr_symbol;

if (symbolP)
  {
    fragS *sym_frag;

    sym_frag = symbol_get_frag (symbolP);

1619#ifndef DIFF_EXPR_OK
    know (sym_frag != NULL);
1621#endif
    know (S_GET_SEGMENT (symbolP) != absolute_section
   || sym_frag == &zero_address_frag);
    target += S_GET_VALUE (symbolP);

    /* If frag has yet to be reached on this pass,
assume it will move by STRETCH just as we did.
If this is not so, it will be because some frag
between grows, and that will force another pass.  */

    if (stretch != 0
 && sym_frag->relax_marker != fragP->relax_marker
 && S_GET_SEGMENT (symbolP) == segment)
{
 target += stretch;
}
  }

aim = target - address - fragP->fr_fix;
1640#ifdef TC_PCREL_ADJUST
/* Currently only the ns32k family needs this.  */
aim += TC_PCREL_ADJUST (fragP);
1643#endif

1645#ifdef md_prepare_relax_scan
/* Formerly called M68K_AIM_KLUDGE.  */
md_prepare_relax_scan (fragP, address, aim, this_state, this_type);
1648#endif

if (aim < 0)
  {
    /* Look backwards.  */
    for (next_state = this_type->rlx_more; next_state;)
if (aim >= this_type->rlx_backward)
 next_state = 0;
else
 {
   /* Grow to next state.  */
   this_state = next_state;
   this_type = table + this_state;
   next_state = this_type->rlx_more;
 }
  }
else
  {
    /* Look forwards.  */
    for (next_state = this_type->rlx_more; next_state;)
if (aim <= this_type->rlx_forward)
 next_state = 0;
else
 {
   /* Grow to next state.  */
   this_state = next_state;
   this_type = table + this_state;
   next_state = this_type->rlx_more;
 }
  }

growth = this_type->rlx_length - start_type->rlx_length;
if (growth != 0)
  fragP->fr_subtype = this_state;
return growth;
1683}

1685#endif /* defined (TC_GENERIC_RELAX_TABLE)  */

1687/* Relax_align. Advance location counter to next address that has 'alignment'
 lowest order bits all 0s, return size of adjustment made.  */
1689static relax_addressT
1690relax_align (register relax_addressT address,	/* Address now.  */
    register int alignment	/* Alignment (binary).  */)
1692{
relax_addressT mask;
relax_addressT new_address;

mask = ~((~0) << alignment);
new_address = (address + mask) & (~mask);
1698#ifdef LINKER_RELAXING_SHRINKS_ONLY
if (linkrelax)
  /* We must provide lots of padding, so the linker can discard it
     when needed.  The linker will not add extra space, ever.  */
  new_address += (1 << alignment);
1703#endif
return (new_address - address);
1705}

1707/* Now we have a segment, not a crowd of sub-segments, we can make
 fr_address values.

 Relax the frags.

 After this, all frags in this segment have addresses that are correct
 within the segment. Since segments live in different file addresses,
 these frag addresses may not be the same as final object-file
 addresses.  */

1717int
1718relax_segment (struct frag *segment_frag_root, segT segment, int pass)
1719{
unsigned long frag_count;
struct frag *fragP;
relax_addressT address;
int ret;

/* In case md_estimate_size_before_relax() wants to make fixSs.  */
subseg_change (segment, 0);

/* For each frag in segment: count and store  (a 1st guess of)
   fr_address.  */
address = 0;
for (frag_count = 0, fragP = segment_frag_root;
     fragP;
     fragP = fragP->fr_next, frag_count ++)
  {
    fragP->relax_marker = 0;
    fragP->fr_address = address;
    address += fragP->fr_fix;

    switch (fragP->fr_type)
{
case rs_fill:
 address += fragP->fr_offset * fragP->fr_var;
 break;

case rs_align:
case rs_align_code:
case rs_align_test:
 {
   addressT offset = relax_align (address, (int) fragP->fr_offset);

   if (fragP->fr_subtype != 0 && offset > fragP->fr_subtype)
     offset = 0;

   if (offset % fragP->fr_var != 0)
     {
as_bad_where (fragP->fr_file, fragP->fr_line,
	      _("alignment padding (%lu bytes) not a multiple of %ld")("alignment padding (%lu bytes) not a multiple of %ld"),
	      (unsigned long) offset, (long) fragP->fr_var);
offset -= (offset % fragP->fr_var);
     }

   address += offset;
 }
 break;

case rs_org:
case rs_space:
 /* Assume .org is nugatory. It will grow with 1st relax.  */
 break;

case rs_machine_dependent:
 /* If fr_symbol is an expression, this call to
    resolve_symbol_value sets up the correct segment, which will
    likely be needed in md_estimate_size_before_relax.  */
 if (fragP->fr_symbol)
   resolve_symbol_value (fragP->fr_symbol);

 address += md_estimate_size_before_relax (fragP, segment);
 break;

1781#ifndef WORKING_DOT_WORD
 /* Broken words don't concern us yet.  */
case rs_broken_word:
 break;
1785#endif

case rs_leb128:
 /* Initial guess is always 1; doing otherwise can result in
    stable solutions that are larger than the minimum.  */
 address += fragP->fr_offset = 1;
 break;

case rs_cfa:
 address += eh_frame_estimate_size_before_relax (fragP);
 break;

case rs_dwarf2dbg:
 address += dwarf2dbg_estimate_size_before_relax (fragP);
 break;

default:
 BAD_CASE (fragP->fr_type){ as_fatal (("Case value %ld unexpected at line %d of file \"%s\"\n"
), (long) fragP->fr_type, 1802, "/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
); };
 break;
}
  }

/* Do relax().  */
{
  unsigned long max_iterations;
  offsetT stretch;	/* May be any size, 0 or negative.  */
  /* Cumulative number of addresses we have relaxed this pass.
     We may have relaxed more than one address.  */
  int stretched;	/* Have we stretched on this pass?  */
  /* This is 'cuz stretch may be zero, when, in fact some piece of code
     grew, and another shrank.  If a branch instruction doesn't fit anymore,
     we could be scrod.  */

  /* We want to prevent going into an infinite loop where one frag grows
     depending upon the location of a symbol which is in turn moved by
     the growing frag.  eg:

       foo = .
       .org foo+16
       foo = .

So we dictate that this algorithm can be at most O2.  */
  max_iterations = frag_count * frag_count;
  /* Check for overflow.  */
  if (max_iterations < frag_count)
    max_iterations = frag_count;

  ret = 0;
  do
    {
stretch = 0;
stretched = 0;

for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
 {
   offsetT growth = 0;
   addressT was_address;
   offsetT offset;
   symbolS *symbolP;

   fragP->relax_marker ^= 1;
   was_address = fragP->fr_address;
   address = fragP->fr_address += stretch;
   symbolP = fragP->fr_symbol;
   offset = fragP->fr_offset;

   switch (fragP->fr_type)
     {
     case rs_fill:	/* .fill never relaxes.  */
growth = 0;
break;

1857#ifndef WORKING_DOT_WORD
/* JF:  This is RMS's idea.  I do *NOT* want to be blamed
   for it I do not want to write it.  I do not want to have
   anything to do with it.  This is not the proper way to
   implement this misfeature.  */
     case rs_broken_word:
{
  struct broken_word *lie;
  struct broken_word *untruth;

  /* Yes this is ugly (storing the broken_word pointer
     in the symbol slot).  Still, this whole chunk of
     code is ugly, and I don't feel like doing anything
     about it.  Think of it as stubbornness in action.  */
  growth = 0;
  for (lie = (struct broken_word *) (fragP->fr_symbol);
       lie && lie->dispfrag == fragP;
       lie = lie->next_broken_word)
    {

      if (lie->added)
	continue;

      offset = (S_GET_VALUE (lie->add)
		+ lie->addnum
		- S_GET_VALUE (lie->sub));
      if (offset <= -32768 || offset >= 32767)
	{
	  if (flag_warn_displacement)
	    {
	      char buf[50];
	      sprint_value (buf, (addressT) lie->addnum);
	      as_warn_where (fragP->fr_file, fragP->fr_line,
			     _(".word %s-%s+%s didn't fit")(".word %s-%s+%s didn't fit"),
			     S_GET_NAME (lie->add),
			     S_GET_NAME (lie->sub),
			     buf);
	    }
	  lie->added = 1;
	  if (fragP->fr_subtype == 0)
	    {
	      fragP->fr_subtype++;
	      growth += md_short_jump_size;
	    }
	  for (untruth = lie->next_broken_word;
	       untruth && untruth->dispfrag == lie->dispfrag;
	       untruth = untruth->next_broken_word)
	    if ((symbol_get_frag (untruth->add)
		 == symbol_get_frag (lie->add))
		&& (S_GET_VALUE (untruth->add)
		    == S_GET_VALUE (lie->add)))
	      {
		untruth->added = 2;
		untruth->use_jump = lie;
	      }
	  growth += md_long_jump_size;
	}
    }

  break;
}		/* case rs_broken_word  */
1918#endif
     case rs_align:
     case rs_align_code:
     case rs_align_test:
{
  addressT oldoff, newoff;

  oldoff = relax_align (was_address + fragP->fr_fix,
			(int) offset);
  newoff = relax_align (address + fragP->fr_fix,
			(int) offset);

  if (fragP->fr_subtype != 0)
    {
      if (oldoff > fragP->fr_subtype)
	oldoff = 0;
      if (newoff > fragP->fr_subtype)
	newoff = 0;
    }

  growth = newoff - oldoff;
}
break;

     case rs_org:
{
  addressT target = offset;
  addressT after;

  if (symbolP)
    {
                    /* Convert from an actual address to an octet offset
                       into the section.  Here it is assumed that the
                       section's VMA is zero, and can omit subtracting it
                       from the symbol's value to get the address offset.  */
                    know (S_GET_SEGMENT (symbolP)->vma == 0);
      target += S_GET_VALUE (symbolP) * OCTETS_PER_BYTE(1<<0);
    }

  know (fragP->fr_next);
  after = fragP->fr_next->fr_address;
  growth = target - after;
  if (growth < 0)
    {
      growth = 0;

      /* Don't error on first few frag relax passes.
	 The symbol might be an expression involving
	 symbol values from other sections.  If those
	 sections have not yet been processed their
	 frags will all have zero addresses, so we
	 will calculate incorrect values for them.  The
	 number of passes we allow before giving an
	 error is somewhat arbitrary.  It should be at
	 least one, with larger values requiring
	 increasingly contrived dependencies between
	 frags to trigger a false error.  */
      if (pass < 2)
	{
	  /* Force another pass.  */
	  ret = 1;
	  break;
	}

      /* Growth may be negative, but variable part of frag
	 cannot have fewer than 0 chars.  That is, we can't
	 .org backwards.  */
      as_bad_where (fragP->fr_file, fragP->fr_line,
		    _("attempt to move .org backwards")("attempt to move .org backwards"));

      /* We've issued an error message.  Change the
                       frag to avoid cascading errors.  */
      fragP->fr_type = rs_align;
      fragP->fr_subtype = 0;
      fragP->fr_offset = 0;
      fragP->fr_fix = after - was_address;
      break;
    }

  /* This is an absolute growth factor  */
  growth -= stretch;
  break;
}

     case rs_space:
growth = 0;
if (symbolP)
  {
    offsetT amount;

    amount = S_GET_VALUE (symbolP);
    if (S_GET_SEGMENT (symbolP) != absolute_section((asection *) &bfd_abs_section)
	|| S_IS_COMMON (symbolP)
	|| ! S_IS_DEFINED (symbolP))
      {
	as_bad_where (fragP->fr_file, fragP->fr_line,
		      _(".space specifies non-absolute value")(".space specifies non-absolute value"));
	/* Prevent repeat of this error message.  */
	fragP->fr_symbol = 0;
      }
    else if (amount < 0)
      {
	/* Don't error on first few frag relax passes.
	   See rs_org comment for a longer explanation.  */
	if (pass < 2)
	  {
	    ret = 1;
	    break;
	  }

	as_warn_where (fragP->fr_file, fragP->fr_line,
		       _(".space or .fill with negative value, ignored")(".space or .fill with negative value, ignored"));
	fragP->fr_symbol = 0;
      }
    else
      growth = (was_address + fragP->fr_fix + amount
		- fragP->fr_next->fr_address);
  }
break;

     case rs_machine_dependent:
2039#ifdef md_relax_frag
growth = md_relax_frag (segment, fragP, stretch);
2041#else
2042#ifdef TC_GENERIC_RELAX_TABLEmd_relax_table
/* The default way to relax a frag is to look through
   TC_GENERIC_RELAX_TABLE.  */
growth = relax_frag (segment, fragP, stretch);
2046#endif /* TC_GENERIC_RELAX_TABLE  */
2047#endif
break;

     case rs_leb128:
{
  valueT value;
  offsetT size;

  value = resolve_symbol_value (fragP->fr_symbol);
  size = sizeof_leb128 (value, fragP->fr_subtype);
  growth = size - fragP->fr_offset;
  fragP->fr_offset = size;
}
break;

     case rs_cfa:
growth = eh_frame_relax_frag (fragP);
break;

     case rs_dwarf2dbg:
growth = dwarf2dbg_relax_frag (fragP);
break;

     default:
BAD_CASE (fragP->fr_type){ as_fatal (("Case value %ld unexpected at line %d of file \"%s\"\n"
), (long) fragP->fr_type, 2071, "/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c"
); };
break;
     }
   if (growth)
     {
stretch += growth;
stretched = 1;
     }
 }
    }
  /* Until nothing further to relax.  */
  while (stretched && -- max_iterations);

  if (stretched)
    as_fatal (_("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s")("Infinite loop encountered whilst attempting to compute the addresses of symbols in section %s"
),
segment_name (segment)((segment)->name + 0));
}

for (fragP = segment_frag_root; fragP; fragP = fragP->fr_next)
  if (fragP->last_fr_address != fragP->fr_address)
    {
fragP->last_fr_address = fragP->fr_address;
ret = 1;
    }
return ret;
2096}

2098/* fixup_segment()

 Go through all the fixS's in a segment and see which ones can be
 handled now.  (These consist of fixS where we have since discovered
 the value of a symbol, or the address of the frag involved.)
 For each one, call md_apply_fix to put the fix into the frag data.

 Result is a count of how many relocation structs will be needed to
 handle the remaining fixS's that we couldn't completely handle here.
 These will be output later by emit_relocations().  */

2109static long
2110fixup_segment (fixS *fixP, segT this_segment)
2111{
long seg_reloc_count = 0;
valueT add_number;
fragS *fragP;
segT add_symbol_segment = absolute_section((asection *) &bfd_abs_section);

if (fixP != NULL((void*)0) && abs_section_sym == NULL((void*)0))
  abs_section_sym = section_symbol (absolute_section((asection *) &bfd_abs_section));

/* If the linker is doing the relaxing, we must not do any fixups.

   Well, strictly speaking that's not true -- we could do any that
   are PC-relative and don't cross regions that could change size.
   And for the i960 we might be able to turn callx/callj into bal
   anyways in cases where we know the maximum displacement.  */
if (linkrelax && TC_LINKRELAX_FIXUP (this_segment)1)
  {
    for (; fixP; fixP = fixP->fx_next)
if (!fixP->fx_done)
 {
   if (fixP->fx_addsy == NULL((void*)0))
     {
/* There was no symbol required by this relocation.
   However, BFD doesn't really handle relocations
   without symbols well. So fake up a local symbol in
   the absolute section.  */
fixP->fx_addsy = abs_section_sym;
     }
   symbol_mark_used_in_reloc (fixP->fx_addsy);
   if (fixP->fx_subsy != NULL((void*)0))
     symbol_mark_used_in_reloc (fixP->fx_subsy);
   seg_reloc_count++;
 }
    TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
    return seg_reloc_count;
  }

for (; fixP; fixP = fixP->fx_next)
  {
2150#ifdef DEBUG5
    fprintf (stderr(&__sF[2]), "\nprocessing fixup:\n");
    print_fixup (fixP);
2153#endif

    fragP = fixP->fx_frag;
    know (fragP);
2157#ifdef TC_VALIDATE_FIX
    TC_VALIDATE_FIX (fixP, this_segment, skip)i386_validate_fix(fixP);
2159#endif
    add_number = fixP->fx_offset;

    if (fixP->fx_addsy != NULL((void*)0)
 && symbol_mri_common_p (fixP->fx_addsy))
{
 add_number += S_GET_VALUE (fixP->fx_addsy);
 fixP->fx_offset = add_number;
 fixP->fx_addsy
   = symbol_get_value_expression (fixP->fx_addsy)->X_add_symbol;
}

    if (fixP->fx_addsy != NULL((void*)0))
add_symbol_segment = S_GET_SEGMENT (fixP->fx_addsy);

    if (fixP->fx_subsy != NULL((void*)0))
{
 segT sub_symbol_segment;
 resolve_symbol_value (fixP->fx_subsy);
 sub_symbol_segment = S_GET_SEGMENT (fixP->fx_subsy);
 if (fixP->fx_addsy != NULL((void*)0)
     && sub_symbol_segment == add_symbol_segment
     && !TC_FORCE_RELOCATION_SUB_SAME (fixP, add_symbol_segment)(! ( (add_symbol_segment) != ((asection *) &bfd_abs_section
) && (add_symbol_segment) != ((asection *) &bfd_und_section
) && (add_symbol_segment) != reg_section && (
add_symbol_segment) != expr_section)))
   {
     add_number += S_GET_VALUE (fixP->fx_addsy);
     add_number -= S_GET_VALUE (fixP->fx_subsy);
     fixP->fx_offset = add_number;
     fixP->fx_addsy = NULL((void*)0);
     fixP->fx_subsy = NULL((void*)0);
2188#ifdef TC_M68K
     /* See the comment below about 68k weirdness.  */
     fixP->fx_pcrel = 0;
2191#endif
   }
 else if (sub_symbol_segment == absolute_section((asection *) &bfd_abs_section)
   && !TC_FORCE_RELOCATION_SUB_ABS (fixP)0)
   {
     add_number -= S_GET_VALUE (fixP->fx_subsy);
     fixP->fx_offset = add_number;
     fixP->fx_subsy = NULL((void*)0);
   }
 else if (sub_symbol_segment == this_segment
   && !TC_FORCE_RELOCATION_SUB_LOCAL (fixP)0)
   {
     add_number -= S_GET_VALUE (fixP->fx_subsy);
     fixP->fx_offset = (add_number + fixP->fx_dot_value
		 + fixP->fx_frag->fr_address);

     /* Make it pc-relative.  If the back-end code has not
 selected a pc-relative reloc, cancel the adjustment
 we do later on all pc-relative relocs.  */
     if (0
2211#ifdef TC_M68K
  /* Do this for m68k even if it's already described
     as pc-relative.  On the m68k, an operand of
     "pc@(foo-.-2)" should address "foo" in a
     pc-relative mode.  */
  || 1
2217#endif
  || !fixP->fx_pcrel)
add_number += MD_PCREL_FROM_SECTION (fixP, this_segment)md_pcrel_from (fixP);
     fixP->fx_subsy = NULL((void*)0);
     fixP->fx_pcrel = 1;
   }
 else if (!TC_VALIDATE_FIX_SUB (fixP)((fixP)->fx_r_type == BFD_RELOC_GPREL32 || (fixP)->fx_r_type
 == BFD_RELOC_GPREL16))
   {
     as_bad_where (fixP->fx_file, fixP->fx_line,
	    _("can't resolve `%s' {%s section} - `%s' {%s section}")("can't resolve `%s' {%s section} - `%s' {%s section}"),
	    fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0",
	    segment_name (add_symbol_segment)((add_symbol_segment)->name + 0),
	    S_GET_NAME (fixP->fx_subsy),
	    segment_name (sub_symbol_segment)((sub_symbol_segment)->name + 0));
   }
}

    if (fixP->fx_addsy)
{
 if (add_symbol_segment == this_segment
     && !TC_FORCE_RELOCATION_LOCAL (fixP)(!(fixP)->fx_pcrel || (fixP)->fx_plt || (fixP)->fx_r_type
 == BFD_RELOC_386_PLT32 || (fixP)->fx_r_type == BFD_RELOC_386_GOT32
 || (fixP)->fx_r_type == BFD_RELOC_386_GOTPC || (fixP)->
fx_r_type == BFD_RELOC_X86_64_GOTPCREL || (generic_force_reloc
 (fixP))))
   {
     /* This fixup was made when the symbol's segment was
 SEG_UNKNOWN, but it is now in the local segment.
 So we know how to do the address without relocation.  */
     add_number += S_GET_VALUE (fixP->fx_addsy);
     fixP->fx_offset = add_number;
     if (fixP->fx_pcrel)
add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment)md_pcrel_from (fixP);
     fixP->fx_addsy = NULL((void*)0);
     fixP->fx_pcrel = 0;
   }
 else if (add_symbol_segment == absolute_section((asection *) &bfd_abs_section)
   && !TC_FORCE_RELOCATION_ABS (fixP)((generic_force_reloc (fixP))))
   {
     add_number += S_GET_VALUE (fixP->fx_addsy);
     fixP->fx_offset = add_number;
     fixP->fx_addsy = NULL((void*)0);
   }
 else if (add_symbol_segment != undefined_section((asection *) &bfd_und_section)
   && ! bfd_is_com_section (add_symbol_segment)(((add_symbol_segment)->flags & 0x1000) != 0)
   && MD_APPLY_SYM_VALUE (fixP)0)
   add_number += S_GET_VALUE (fixP->fx_addsy);
}

    if (fixP->fx_pcrel)
{
 add_number -= MD_PCREL_FROM_SECTION (fixP, this_segment)md_pcrel_from (fixP);
 if (!fixP->fx_done && fixP->fx_addsy == NULL((void*)0))
   {
     /* There was no symbol required by this relocation.
 However, BFD doesn't really handle relocations
 without symbols well. So fake up a local symbol in
 the absolute section.  */
     fixP->fx_addsy = abs_section_sym;
   }
}

    if (!fixP->fx_done)
md_apply_fix (fixP, &add_number, this_segment);

    if (!fixP->fx_done)
{
 ++seg_reloc_count;
 if (fixP->fx_addsy == NULL((void*)0))
   fixP->fx_addsy = abs_section_sym;
 symbol_mark_used_in_reloc (fixP->fx_addsy);
 if (fixP->fx_subsy != NULL((void*)0))
   symbol_mark_used_in_reloc (fixP->fx_subsy);
}

    if (!fixP->fx_bit_fixP && !fixP->fx_no_overflow && fixP->fx_size != 0)
{
 if (fixP->fx_size < sizeof (valueT))
   {
     valueT mask;

     mask = 0;
     mask--;		/* Set all bits to one.  */
     mask <<= fixP->fx_size * 8 - (fixP->fx_signed ? 1 : 0);
     if ((add_number & mask) != 0 && (add_number & mask) != mask)
{
  char buf[50], buf2[50];
  sprint_value (buf, fragP->fr_address + fixP->fx_where);
  if (add_number > 1000)
    sprint_value (buf2, add_number);
  else
    sprintf (buf2, "%ld", (long) add_number);
  as_bad_where (fixP->fx_file, fixP->fx_line,
		_("value of %s too large for field of %d bytes at %s")("value of %s too large for field of %d bytes at %s"),
		buf2, fixP->fx_size, buf);
} /* Generic error checking.  */
   }
2310#ifdef WARN_SIGNED_OVERFLOW_WORD
 /* Warn if a .word value is too large when treated as a signed
    number.  We already know it is not too negative.  This is to
    catch over-large switches generated by gcc on the 68k.  */
 if (!flag_signed_overflow_ok
     && fixP->fx_size == 2
     && add_number > 0x7fff)
   as_bad_where (fixP->fx_file, fixP->fx_line,
	  _("signed .word overflow; switch may be too large; %ld at 0x%lx")("signed .word overflow; switch may be too large; %ld at 0x%lx"
),
	  (long) add_number,
	  (long) (fragP->fr_address + fixP->fx_where));
2321#endif
}			/* Not a bit fix.  */

2324#ifdef TC_VALIDATE_FIX
  skip:  ATTRIBUTE_UNUSED_LABEL__attribute__ ((__unused__))
    ;
2327#endif
2328#ifdef DEBUG5
    fprintf (stderr(&__sF[2]), "result:\n");
    print_fixup (fixP);
2331#endif
  }				/* For each fixS in this segment.  */

TC_ADJUST_RELOC_COUNT (fixP, seg_reloc_count);
return seg_reloc_count;
2336}

2338void
2339number_to_chars_bigendian (char *buf, valueT val, int n)
2340{
if (n <= 0)
  abort ()as_abort ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c", 2342
, __PRETTY_FUNCTION__);
while (n--)
  {
    buf[n] = val & 0xff;
    val >>= 8;
  }
2348}

2350void
2351number_to_chars_littleendian (char *buf, valueT val, int n)
2352{
if (n <= 0)
  abort ()as_abort ("/usr/src/gnu/usr.bin/binutils-2.17/gas/write.c", 2354
, __PRETTY_FUNCTION__);
while (n--)
  {
    *buf++ = val & 0xff;
    val >>= 8;
  }
2360}

2362void
2363write_print_statistics (FILE *file)
2364{
fprintf (file, "fixups: %d\n", n_fixups);
2366}

2368/* For debugging.  */
2369extern int indent_level;

2371void
2372print_fixup (fixS *fixp)
2373{
indent_level = 1;
fprintf (stderr(&__sF[2]), "fix %lx %s:%d", (long) fixp, fixp->fx_file, fixp->fx_line);
if (fixp->fx_pcrel)
  fprintf (stderr(&__sF[2]), " pcrel");
if (fixp->fx_pcrel_adjust)
  fprintf (stderr(&__sF[2]), " pcrel_adjust=%d", fixp->fx_pcrel_adjust);
if (fixp->fx_im_disp)
  {
2382#ifdef TC_NS32K
    fprintf (stderr(&__sF[2]), " im_disp=%d", fixp->fx_im_disp);
2384#else
    fprintf (stderr(&__sF[2]), " im_disp");
2386#endif
  }
if (fixp->fx_tcbit)
  fprintf (stderr(&__sF[2]), " tcbit");
if (fixp->fx_done)
  fprintf (stderr(&__sF[2]), " done");
fprintf (stderr(&__sF[2]), "\n    size=%d frag=%lx where=%ld offset=%lx addnumber=%lx",
  fixp->fx_size, (long) fixp->fx_frag, (long) fixp->fx_where,
  (long) fixp->fx_offset, (long) fixp->fx_addnumber);
fprintf (stderr(&__sF[2]), "\n    %s (%d)", bfd_get_reloc_code_name (fixp->fx_r_type),
  fixp->fx_r_type);
if (fixp->fx_addsy)
  {
    fprintf (stderr(&__sF[2]), "\n   +<");
    print_symbol_value_1 (stderr(&__sF[2]), fixp->fx_addsy);
    fprintf (stderr(&__sF[2]), ">");
  }
if (fixp->fx_subsy)
  {
    fprintf (stderr(&__sF[2]), "\n   -<");
    print_symbol_value_1 (stderr(&__sF[2]), fixp->fx_subsy);
    fprintf (stderr(&__sF[2]), ">");
  }
fprintf (stderr(&__sF[2]), "\n");
2410#ifdef TC_FIX_DATA_PRINT
TC_FIX_DATA_PRINT (stderr(&__sF[2]), fixp);
2412#endif
2413}